ATE72223T1 - PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE. - Google Patents
PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE.Info
- Publication number
- ATE72223T1 ATE72223T1 AT88420024T AT88420024T ATE72223T1 AT E72223 T1 ATE72223 T1 AT E72223T1 AT 88420024 T AT88420024 T AT 88420024T AT 88420024 T AT88420024 T AT 88420024T AT E72223 T1 ATE72223 T1 AT E72223T1
- Authority
- AT
- Austria
- Prior art keywords
- methoxybenzaldehyde
- preparation
- bromo
- hydroxy
- trialkoxybenzaldehyde
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/52—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings
- C07C47/575—Compounds having —CHO groups bound to carbon atoms of six—membered aromatic rings containing ether groups, groups, groups, or groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/64—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by introduction of functional groups containing oxygen only in singly bound form
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
- C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
- C07C45/70—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction with functional groups containing oxygen only in singly bound form
- C07C45/71—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction with functional groups containing oxygen only in singly bound form being hydroxy groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Catalysts (AREA)
Abstract
An improved process for the preparation of 3,4,5-trialkoxybenzaldehyde and more particularly of 3,4,5-trimethoxybenzaldehyde from 5-bromo-4-hydroxy- 3-methoxybenzaldehyde.
<??>More precisely, a process for the preparation of 4,5-dialkoxy- 3-methoxybenzaldehyde from 5-bromo-4-hydroxy-3-methoxybenzaldehyde, characterised in that the following are carried out successively and without isolation of the intermediate compounds:
- hydrolysis of 5-bromo-4-hydroxy-3-methoxybenzaldehyde to 4,5-dihydroxy-3-methoxybenzaldehyde using an alkali metal hydroxide in water and in the presence of a copper catalyst:
- etherification of the 4,5-dihydroxy-3-methoxybenzaldehyde obtained previously with the aid of a lower alkyl halide in an aqueous medium and while the pH is maintained at chosen values, optionally in the presence of a catalyst.
<??>3,4,5-Trimethoxybenzaldehyde which may be prepared by this process is used especially for the preparation of pharmaceutical products.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8701174A FR2609984B1 (en) | 1987-01-28 | 1987-01-28 | PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE |
EP88420024A EP0277894B1 (en) | 1987-01-28 | 1988-01-27 | Process for the preparation of trialkoxybenzaldehyde |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE72223T1 true ATE72223T1 (en) | 1992-02-15 |
Family
ID=9347458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT88420024T ATE72223T1 (en) | 1987-01-28 | 1988-01-27 | PROCESS FOR THE PREPARATION OF TRIALKOXYBENZALDEHYDE. |
Country Status (7)
Country | Link |
---|---|
US (1) | US4933498A (en) |
EP (1) | EP0277894B1 (en) |
JP (1) | JPS63201144A (en) |
AT (1) | ATE72223T1 (en) |
BR (1) | BR8800296A (en) |
DE (1) | DE3868081D1 (en) |
FR (1) | FR2609984B1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4914243A (en) * | 1987-12-23 | 1990-04-03 | American Home Products Corporation | Production of 2-alkoxy or aryl(lower)alkoxy-6-methoxy-1-naphthalenecarboxaldehyde |
FR2669026A1 (en) * | 1990-11-09 | 1992-05-15 | Rhone Poulenc Chimie | Process for the preparation of alkoxybenzaldehydes |
FR2669025A1 (en) * | 1990-11-09 | 1992-05-15 | Rhone Poulenc Chimie | Process for the preparation of alkoxybenzaldehydes |
FR2669024A1 (en) * | 1990-11-09 | 1992-05-15 | Rhone Poulenc Chimie | Process for the preparation of alkoxybenzaldehydes |
FR2669924B1 (en) * | 1990-11-30 | 1993-01-29 | Rhone Poulenc Chimie | PROCESS FOR THE PREPARATION OF POLYALKOXYLATED AROMATIC COMPOUNDS. |
FR2663925A1 (en) * | 1990-06-27 | 1992-01-03 | Rhone Poulenc Chimie | Process for the preparation of alkoxybenzaldehydes |
EP0463946A1 (en) * | 1990-06-27 | 1992-01-02 | Rhone-Poulenc Chimie | Process for the preparation of polyalkoxylated aromatic compounds |
FR2669925B1 (en) * | 1990-11-30 | 1993-01-29 | Rhone Poulenc Chimie | PROCESS FOR THE PREPARATION OF POLYALKOXYLATED AROMATIC COMPOUNDS. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE789586A (en) * | 1972-03-27 | 1973-04-02 | Hoffmann La Roche | PROCESS FOR THE PREPARATION OF 3,4,5-TRIMETHOXY-BENZALDEHYDE |
JPS56150034A (en) * | 1980-04-24 | 1981-11-20 | Ube Ind Ltd | Preparation of 3,4,5-trimethoxybenzaldehyde |
US4465864A (en) * | 1982-08-02 | 1984-08-14 | International Telephone And Telegraph Corporation | Process of hydroxylation of an aromatic carbonyl compound |
-
1987
- 1987-01-28 FR FR8701174A patent/FR2609984B1/en not_active Expired
-
1988
- 1988-01-25 JP JP63012777A patent/JPS63201144A/en active Granted
- 1988-01-26 BR BR8800296A patent/BR8800296A/en unknown
- 1988-01-27 DE DE8888420024T patent/DE3868081D1/en not_active Expired - Fee Related
- 1988-01-27 AT AT88420024T patent/ATE72223T1/en not_active IP Right Cessation
- 1988-01-27 EP EP88420024A patent/EP0277894B1/en not_active Expired - Lifetime
-
1989
- 1989-08-07 US US07/391,410 patent/US4933498A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2609984B1 (en) | 1989-05-05 |
JPS63201144A (en) | 1988-08-19 |
DE3868081D1 (en) | 1992-03-12 |
EP0277894A2 (en) | 1988-08-10 |
EP0277894A3 (en) | 1988-08-24 |
BR8800296A (en) | 1988-09-06 |
US4933498A (en) | 1990-06-12 |
FR2609984A1 (en) | 1988-07-29 |
EP0277894B1 (en) | 1992-01-29 |
JPH0532379B2 (en) | 1993-05-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RER | Ceased as to paragraph 5 lit. 3 law introducing patent treaties |